@base . a , , ; , , ; "Directory of senior centers and clubs." ; ; ; "0098-2709" ; ; "0098-2709" ; ; "0098-2709" ; "Directory of senior centers and clubs." , "Directory of senior centers and clubs" ; . . a ; . a ; "0098-2709" ; . a . a , ; "Directory of senior centers and clubs" . a ; ; "20050914111400.0"^^ ; ; . a ; "0098-2709" ; . "District of Columbia" .